The influence of powder characteristics on densification behavior and microstructure evolution of W-Cr-Zr alloy consolidated by field-assisted sintering technology. (November 2022)

• Record Type: Journal Article
• Authors: Wang, W.J.; Tan, X.Y.; Yang, S.P.; Mao, Y.R.; Luo, L.M.; Zhu, X.Y.; Litnovsky, A.; Coenen, J.W.; Linsmeier, Ch.; Wu, Y.C.
• Is Part Of: International journal of refractory metals & hard materials. Volume 108(2022)
• Publication Date: 2022-11
• Subjects: Field-assisted sintering technology -- Self-passivating tungsten alloys -- Powder characteristics -- Densification behavior -- Microstructure evolution; Heat resistant alloys -- Periodicals; Refractory materials -- Periodicals; Metallography -- Periodicals; Alliages réfractaires -- Périodiques; Matériaux réfractaires -- Périodiques; Métallographie -- Périodiques; Heat resistant alloys; Metallography; Refractory materials; Periodicals; Electronic journals; 669.73
• DOI: 10.1016/j.ijrmhm.2022.105939
• Languages: English
• ISSNs: 0263-4368

Abstract

Abstract: In the present study, the influence of powder characteristics on the densification behavior and microstructure evolution of the W-Cr-Zr alloy during consolidation was investigated. The W-Cr-Zr alloy powders were prepared through mechanical alloying in different modes, i.e. continuous mechanical alloying (CMA) and intermittently mechanical alloying (IMA). It can be found that the IMA powders have a higher grain boundary density and homogenous microstructure, which exhibits a better sintering performance than the CMA powders. The IMA powders are capable of full densification and homogenization after sintering at low temperature (1395 °C), with the grain size approaching 284 nm. Through the characterization of antioxidant properties, it was confirmed that the alloy prepared using IMA powders has an excellent anti-oxidation performance. Graphical abstract: Image 1 Highlights: The powders characteristic was considered to manufacture W-Cr-Zr alloy. The homogeneous and fine-crystal alloy powder has high sintering performance. W-Cr-Zr alloy has high relative density, homogeneous and fine-grained microstructure.